Active Directory

Introduction If you want to completely remove a child domain and its domain controller that was no longer active or orphaned due to some reasons, you can follow the following steps. Be carefull and follow the steps, and remember that the child domain controller server which is already removed is probibited to be turn of until you remove the ADCS role or reinstall the server. Steps You will need to remove the child domain controllers first, and then proceed to remove the child domain from your forest....

AD Functional level and DC list Functional Level Check Forest functional Level Get-ADForest | ft ForestMode Check Domain functional Level Get-ADDomain | ft DomainMode Upgrade / set Functional level Set-ADForestMode –ForestMode <desired forest level> Set-ADDomainMode –DomainMode <desired domain level> Show all DC servers netdom query dc DSQUERY Server -o rdn FSMO Get FSMO roles Get-ADDomain | select InfrastructureMaster, PDCEmulator, RIDMaster Get-ADForest | select DomainNamingMaster, SchemaMaster Transfer FSMO # Transfer PDCEmulator Move-ADDirectoryServerOperationMasterRole -Identity "DC01" PDCEmulator # Transfer RIDMaster Move-ADDirectoryServerOperationMasterRole -Identity "DC01" RIDMaster # Transfer InfrastrctureMaster Move-ADDirectoryServerOperationMasterRole -Identity "DC01" Infrastructuremaster # Transfer DomainNamingMaster Move-ADDirectoryServerOperationMasterRole -Identity "DC01" DomainNamingmaster # Transfer SchemaMaster Move-ADDirectoryServerOperationMasterRole -Identity "DC01" SchemaMaster Seize FSMO The different between transfering and seizeing the FSMO role is by adding -force argument at the end of command....

Introduction RSOP stands for “Resultant Set of Policy.” It is a concept and a tool used in Microsoft Windows operating systems to determine the effective Group Policy settings that are applied to a user or computer. Group Policy is a feature in Windows that allows administrators to control various aspects of the operating system’s behavior and configuration within a network environment. RSOP provides a way to understand which Group Policy settings are actually being applied and in effect on a given user or computer....

Introduction Group Policy is a feature in Microsoft Windows operating systems that allows administrators to manage and configure the settings of user accounts and computer systems centrally and then deploy them to computers across their organizations. The Administrator can define, enforce, and update their entire configuration by using GPO settings. By using GPO settings, they can affect an entire site or a domain within their organization, or they can narrow their focus to a single OU....

Introduction FSMO (Flexible Single Master Operations) roles are specialized roles in an Active Directory domain that are responsible for specific tasks related to the management and maintenance of the directory. These roles are crucial for the proper functioning of an Active Directory environment. By default, the first domain controller installed in a forest hosts all five roles. However, you can transfer these roles after deploying additional domain controllers. When performing operations master-specific changes, you must connect to the domain controller with the role....

Introduction FSMO (Flexible Single Master Operations) roles are specialized roles in an Active Directory domain that are responsible for specific tasks related to the management and maintenance of the directory. These roles are crucial for the proper functioning of an Active Directory environment. By default, the first domain controller installed in a forest hosts all five roles. However, you can transfer these roles after deploying additional domain controllers. When performing operations master-specific changes, you must connect to the domain controller with the role....

Pre-requirement Check and ensure the AD environment is healthy. Check all DCs in this domain is working fine by running Dcdiag /v on every DC. Check if AD replication works properly by running repadmin /showrepl and repadmin /replsum on every DC. 2.Back up all domain controllers if needed. Promote Secondary Domain Controllers Install Windows, patch it to the latest patches. Run sconfig, configure the computer name, IP Address, DNS and reboot the machine....